- #1
Wailing Fungus
- 6
- 0
What is the difference between enthalpy of dissolution and enthalpy of solution?
I have a lab where I have to measure the change in enthalpy of dissolution of several salts in water. I found the change in enthalpy, however I am supposed to compare them with the real values. I looked in the CRC handbook and there was only a table with changes in enthalpies of solution, these were different values than the ones I got.
Another thing that I do not undestand is that my reactions were endothermic but my enthalpies of dissolution were all negative. Doesn't enthalpy change indicate if a reaction is exothermic or endothermic? Unless enthalpy of dissolution indicates something else. I used the following equations:
q = CdT where C is the calorimeter constant
then
dH = q / n where dH is the change in enthalpy of dissolution
I have a lab where I have to measure the change in enthalpy of dissolution of several salts in water. I found the change in enthalpy, however I am supposed to compare them with the real values. I looked in the CRC handbook and there was only a table with changes in enthalpies of solution, these were different values than the ones I got.
Another thing that I do not undestand is that my reactions were endothermic but my enthalpies of dissolution were all negative. Doesn't enthalpy change indicate if a reaction is exothermic or endothermic? Unless enthalpy of dissolution indicates something else. I used the following equations:
q = CdT where C is the calorimeter constant
then
dH = q / n where dH is the change in enthalpy of dissolution